CVE-2023-54255

Kernel panic via incorrect DMA channel offsets

Published Dec 30, 2025 · Updated Dec 30, 2025

Denial of service in the Linux kernel allows local users to cause a kernel panic through DMA on affected SH-family systems. The dma_base_addr(), dmaor_read_reg(), and dmaor_write_reg() paths miscalculate channel offsets and can select the wrong DMAC module base. Reachability requires an SH3, SH4, or SH4A system using this driver and a channel layout the old calculation mishandles; the bounded consequence is a kernel panic.

CVSS severity7.0
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux kernel allows local users to cause a kernel panic through DMA on affected SH-family systems. The dma_base_addr(), dmaor_read_reg(), and dmaor_write_reg() paths miscalculate channel offsets and can select the wrong DMAC module base. Reachability requires an SH3, SH4, or SH4A system using this driver and a channel layout the old calculation mishandles; the bounded consequence is a kernel panic.

The record

CVE
CVE-2023-54255
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.5
  2. Affected versionversion=7f47c7189b3e8f19a589f77a3ad169d7b691b582 <196f6c71905aa384c0177acf194a1144d480333b
  3. Affected versionversion=7f47c7189b3e8f19a589f77a3ad169d7b691b582 <479380acfa63247b5ac62476138f847aefc62692
  4. Affected versionversion=7f47c7189b3e8f19a589f77a3ad169d7b691b582 <4989627157735c1f1619f08e5bc1592418e7c878
  5. Affected versionversion=7f47c7189b3e8f19a589f77a3ad169d7b691b582 <8fb11fa4805699c6b73a9c8a9d45807f9874abe3
  6. Affected versionversion=7f47c7189b3e8f19a589f77a3ad169d7b691b582 <bca700b48c72f4ffeee977a2ed0eb4a6b4b7b8ad
  7. Affected versionversion=7f47c7189b3e8f19a589f77a3ad169d7b691b582 <d1c946552af299f4fa85bf7da15e328123771128
  8. Affected versionversion=7f47c7189b3e8f19a589f77a3ad169d7b691b582 <e82e47584847129a20b8c9f4a1dcde09374fb0e0
  9. Affected versionversion=7f47c7189b3e8f19a589f77a3ad169d7b691b582 <e9e33faea104381bac80ac79328f0540fc2969f2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=3.5; version=7f47c7189b3e8f19a589f77a3ad169d7b691b582 <196f6c71905aa384c0177acf194a1144d480333b; version=7f47c7189b3e8f19a589f77a3ad169d7b691b582 <479380acfa63247b5ac62476138f847aefc62692; version=7f47c7189b3e8f19a589f77a3ad169d7b691b582 <4989627157735c1f1619f08e5bc1592418e7c878; version=7f47c7189b3e8f19a589f77a3ad169d7b691b582 <8fb11fa4805699c6b73a9c8a9d45807f9874abe3; version=7f47c7189b3e8f19a589f77a3ad169d7b691b582 <bca700b48c72f4ffeee977a2ed0eb4a6b4b7b8ad; version=7f47c7189b3e8f19a589f77a3ad169d7b691b582 <d1c946552af299f4fa85bf7da15e328123771128; version=7f47c7189b3e8f19a589f77a3ad169d7b691b582 <e82e47584847129a20b8c9f4a1dcde09374fb0e0; version=7f47c7189b3e8f19a589f77a3ad169d7b691b582 <e9e33faea104381bac80ac79328f0540fc2969f2

Published CVSS scores

7.0SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
6.1SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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